I’ve encountered a problem with the beta. If you have two panes open, the git panel open, and a git diff tab open in one of the panels, some actions (I tested Ctrl+S, Alt-Tab) will cause the git diff to be copied to the other window.

Thanks for the report! I can reproduce with 1.20.0-beta5 on Ubuntu 16.04 - if it’s not too much trouble, can you open an issue in the GitHub package repository and fill out the issue template so the team can take a look?